$color1: rgb(250, 203, 203);
$color2: rgb(237, 252, 202);
$color3: rgb(197, 248, 241);
$color4: rgb(206, 200, 243);
$font-songti:'思源宋体 Medium';
$bg-color:#f2f2f2;
$white:#fff;


$navHeight:80px;



.container{
    margin: 0 auto;
    width: 1200px;
}
ul li {
    list-style-type: none;
}

.flex{
    display: flex;
}

.flex-row{
    display: flex;
    flex-direction: row; 
}

.flex-col{
    display: flex;
    flex-direction: column;
}

.at-center{
    align-items: center;
}

.j-center{
    justify-content: center;
}

.j-sb{
    justify-content: space-between;
}

.j-a{
    justify-content: space-around;
}

.mt10{
    margin-top: 10px;
}

.mr10{
    margin-right: 10px;
}

.fixed-top{
    position: fixed;
    width: 100%;
    z-index: 999;
    background-color: #fff;
}
.ml10{
    margin-left: 10px;
}
.w100{
    width: 100%;
}
